Telltales - How it works.docx

7/27/2019 Telltales - How it works.docx

1/17

1

Telltales

How it works


2/17

2

Summary:

1. ABS Anti Blocking System.42. Brake lining remaining.73. Brake Fluid Level Low..84. Diesel exhaust fluid (DEF)...85. Differential Lock...86. Driveline retarder..107. EBS Failure..108. EDC Fault.....119. Electronic stability control1110. Engine coolant temperature.1211. Engine Pre-Heating.1212. Engine retarder1313. Immobilizer..1314. Lane departure warning..1415. OBD II Malfunction....1416. Power take OFF..1517. Urea level.1518. Bibliography.16


3/17

3

Telltalemeans an optical signal that, when alight, indicates the actuation ofa device, a correct or defective functioning or condition, or a failure to function.


4/17

4

1. ABS Anti Blocking Sistem

Location of anti-lock brake components

- Stopping a car in a hurry on a slippery road can be very challenging. Anti-lock braking

systems (ABS) take a lot of the challenge out of this sometimes nerve-wracking event. Infact, on slippery surfaces, even professional drivers can't stop as quickly without ABS as

an average driver can with ABS.

Anti-lock brake pump and valves
http://auto.howstuffworks.com/brake-pictures.htmhttp://auto.howstuffworks.com/brake-pictures.htm


5/17

5

- The anti-lock braking system needs some way of knowing when a wheel is about to

lock up. The speed sensors, which are located at each wheel, or in some cases in thedifferential, provide this information.

- The controller monitors the speed sensors at all times. It is looking for decelerations inthe wheel that are out of the ordinary. Right before wheel locks up, it will experience a

rapid deceleration. If left unchecked, the wheel would stop much more quickly than any

car could. It might take a car five seconds to stop from 60 mph (96.6 kph) under idealconditions, but a wheel that locks up could stop spinning in less than a second.

- The ABS controller knows that such a rapid deceleration is impossible, so it reduces thepressure to that brake until it sees an acceleration, then it increases the pressure until it

sees the deceleration again. It can do this very quickly, before the tire can actually

significantly change speed. The result is that the tire slows down at the same rate as the

car, with the brakes keeping the tires very near the point at which they will start to lock

up. This gives the system maximum braking power.
http://auto.howstuffworks.com/auto-parts/brakes/brake-types/differential.htmhttp://auto.howstuffworks.com/auto-parts/brakes/brake-types/tire.htmhttp://auto.howstuffworks.com/auto-parts/brakes/brake-types/tire.htmhttp://auto.howstuffworks.com/auto-parts/brakes/brake-types/differential.htm


6/17

6

Anti-lock brake components


7/17

7

2. Brake lining remaining

- Brake linings are the consumable surfaces in brake systems, especially drum brakes as

those used in vehicles.

- Brake linings are composed of a relatively soft but tough and heat-resistant materialwith a high coefficient of dynamic friction (and ideally an identical coefficient of staticfriction) typically mounted to a solid metal backing using high-temperature adhesives or

rivets. The complete assembly (including lining and backing) is then often called a brake

pad orbrake shoe.

An automobile disc brake

- In this view of an automobile disc brake, the brake pad is the black material held by thered metal component (the brake caliper). The brake lining is that part of the brake pad

which actually contacts the metal disc when the brake is engaged.

- Using a typical bicycle brake as an example, the backing would be the metal shell

which provides mechanical support, and the lining would be the rubbery portion which

contacts the rims when the brakes are applied. In most modern vehicular applications thesystem is conceptually identical, except the rims would be replaced with solid steel (or

sometimes exotic metal) disc. Furthermore, a metal tang is usually incorporated into the

pad assembly. The tang contacts the rotors when the linings are worn out, causing anannoying noise designed to alert the motorist that brake servicing is required.

- Since the lining is the portion of the braking system which converts the vehicle's kinetic

energy into heat, the lining must be capable of surviving high temperatures without

excessive wear (leading to frequent replacement) oroutgassing (which causes brake fade,a decrease in the stopping power of the brake).
http://en.wikipedia.org/wiki/Brakehttp://en.wikipedia.org/wiki/Drum_brakehttp://en.wikipedia.org/wiki/Coefficient_of_frictionhttp://en.wikipedia.org/wiki/Frictionhttp://en.wikipedia.org/wiki/Adhesiveshttp://en.wikipedia.org/wiki/Brake_padhttp://en.wikipedia.org/wiki/Brake_padhttp://en.wikipedia.org/wiki/Brake_shoehttp://en.wikipedia.org/wiki/Disc_brakehttp://en.wikipedia.org/wiki/Disc_brakehttp://en.wikipedia.org/wiki/Disc_brakehttp://en.wiktionary.org/wiki/tanghttp://en.wikipedia.org/wiki/Kinetic_energyhttp://en.wikipedia.org/wiki/Kinetic_energyhttp://en.wikipedia.org/wiki/Outgassinghttp://en.wikipedia.org/wiki/Brake_fadehttp://en.wikipedia.org/wiki/File:Disk_brake_dsc03682.jpghttp://en.wikipedia.org/wiki/Brake_fadehttp://en.wikipedia.org/wiki/Outgassinghttp://en.wikipedia.org/wiki/Kinetic_energyhttp://en.wikipedia.org/wiki/Kinetic_energyhttp://en.wiktionary.org/wiki/tanghttp://en.wikipedia.org/wiki/Disc_brakehttp://en.wikipedia.org/wiki/Disc_brakehttp://en.wikipedia.org/wiki/Disc_brakehttp://en.wikipedia.org/wiki/Brake_shoehttp://en.wikipedia.org/wiki/Brake_padhttp://en.wikipedia.org/wiki/Brake_padhttp://en.wikipedia.org/wiki/Adhesiveshttp://en.wikipedia.org/wiki/Frictionhttp://en.wikipedia.org/wiki/Coefficient_of_frictionhttp://en.wikipedia.org/wiki/Drum_brakehttp://en.wikipedia.org/wiki/Brake


8/17

8

3. Brake Fluid Level Low

- Brake fluid is a type of hydraulic fluid used in hydraulic brake applications in

automobiles, motorcycles, light trucks, and some advanced bicycles. It is used to transferforce into pressure. It works because liquids are not appreciably compressible - in theirnatural state the component molecules do not have internal voids and the molecules pack

together well, so bulk forces are directly transferred to trying to compress the fluid's

chemical bonds.

- Brake fluid is also commonly used in hydraulic clutches.

- Because oils damage rubber seals and hoses in the braking system, brake fluids are not

petroleum-based. Most brake fluids used today are glycol-etherbased, but mineral oil

(Citron liquide hydraulique minral LHM) and silicone (DOT 5) based fluids are also

available.

4. Diesel exhaust fluid (DEF)

(inducement less or more severe)

- To identify the fluid used to reduce emissions from operation of the diesel engine by

means of a selective catalytic reaction.

- To identify the container or fill point for diesel exhaust fluid.

- To identify the display that provides information about the quantity of diesel exhaustfluid in the tank.

5. Differential Lock

- The differential is a device that splits the engine torque two ways, allowing each output

to spin at a different speed.
http://en.wikipedia.org/wiki/Hydraulic_fluidhttp://en.wikipedia.org/wiki/Hydraulic_brakehttp://en.wikipedia.org/wiki/Automobilehttp://en.wikipedia.org/wiki/Motorcyclehttp://en.wikipedia.org/wiki/Light_truckhttp://en.wikipedia.org/wiki/Bicyclehttp://en.wikipedia.org/wiki/Liquidhttp://en.wikipedia.org/wiki/Compression_%28physical%29http://en.wikipedia.org/wiki/Clutchhttp://en.wikipedia.org/w/index.php?title=Glycol-ether&action=edit&redlink=1http://en.wikipedia.org/wiki/Citro%C3%ABn_DShttp://en.wikipedia.org/wiki/DOT_5http://auto.howstuffworks.com/fpte3.htmhttp://auto.howstuffworks.com/fpte3.htmhttp://en.wikipedia.org/wiki/DOT_5http://en.wikipedia.org/wiki/Citro%C3%ABn_DShttp://en.wikipedia.org/w/index.php?title=Glycol-ether&action=edit&redlink=1http://en.wikipedia.org/wiki/Clutchhttp://en.wikipedia.org/wiki/Compression_%28physical%29http://en.wikipedia.org/wiki/Liquidhttp://en.wikipedia.org/wiki/Bicyclehttp://en.wikipedia.org/wiki/Light_truckhttp://en.wikipedia.org/wiki/Motorcyclehttp://en.wikipedia.org/wiki/Automobilehttp://en.wikipedia.org/wiki/Hydraulic_brakehttp://en.wikipedia.org/wiki/Hydraulic_fluid


9/17

9

- The differential is found on all modern cars and trucks, and also in many all- wheel-

drive vehicles.


10/17

10

- When a differential is locked, it causes both axles to receive equal drive at same time. a

differential that is not locked has drive 70% power to one axle therefore if for example

the drive wheel is stuck in mud, it will spin while other wheel does not drive.

6. Driveline retarder

- Installed on the driveshaft between the transmission and rear axle. A hydraulic type

absorbs the truck's momentum energy by pumping oil, while the electromagnetic type

sets up a magnetic field that grabs at the driveline. Absorbed energy is transferred to the

surrounding atmosphere as heat. Switches usually control actuation on modern exhaustbrakes and driveline retarders.

- No compression brakes are made for midrange diesels, so exhaust brakes and drivelineretarders are it for medium-duty trucks. These devices are likewise the only viable

possibility for heavy vehicles running at low speeds in stop-and-start service, such as city

buses and trash trucks.

7. EBS Failure

(Emergency brake system)

- An emergency brake is a backup braking system designed to function even when there

is total brake failure. It works through purely mechanical means, and is independent of


11/17

11

the hydraulic system which controls the brakes normally. In addition to being used in

emergency situations, an emergency brake is also used as a parking brake, to prevent the

car from rolling away, should it slip into gear. Like all parts of the braking system, theemergency brake should be checked regularly to ensure that it is in good working order.

- To activate the emergency brake, the driver typically pulls up a lever or pushes a pedalin the front of the vehicle. Steel cables attached to the emergency brake run to the rear

brakes of the car, which are typically drum brakes. When the cables are tightened, they

pull the brake shoes into contact with the drum of the brake, bringing the car to a stop. Inthe case ofdisc brakes, the brake cables are attached to a small screw mechanism that

pushes a piston into contact with the brake pads, forcing them to grip the brake rotor.

Typically the brake has a self-locking system, meaning that the driver must lower the

lever or move the pedal to take the brake off.

8. EDC Fault

- Electronic Diesel Control is a diesel engine fuel injection control system for the precise

metering and delivery of fuel into the combustion chamberof modern diesel engines usedin trucks and cars.

9. Electronic stability control (ESC)

- The electronic stability control system doesn't work all alone -- it uses the car's other

safety and regulatory devices, like anti-lock braking and traction control, to correctproblems before they become accidents.

- The center of the ESC system is also the center of the car: the yaw control sensor. It's

almost always located as close to the very center of the car as possible. If you were sitting

in the driver's seat, the yaw control sensor would be under your right elbow, somewhere

between you and the passenger.

- Ships and cars both experience yaw, which is a movement around a vertical, or z, axis.

It's as if the car were pinned like a butterfly in a display case, where the pin is the z axis.The yaw sensor is right at the center of the pin. If the ESC system detects that the car is

swinging too far (or not far enough) around that up-and-down axis, it springs into actionto assist.

- Using all the modern electronic systems at its disposal, the ESC can activate one or

more individual brakes, depending on which wheel can increase driving safety the most,and control the throttle to lessen the speed at which the car is traveling. The sensor is

looking for differences between the direction of the steering wheel and the direction the
http://www.wisegeek.com/what-are-drum-brakes.htmhttp://www.wisegeek.com/what-are-brake-shoes.htmhttp://www.wisegeek.com/what-are-disc-brakes.htmhttp://www.wisegeek.com/what-are-brake-pads.htmhttp://www.wisegeek.com/what-is-a-rotor.htmhttp://en.wikipedia.org/wiki/Diesel_enginehttp://en.wikipedia.org/wiki/Fuel_injectionhttp://en.wikipedia.org/wiki/Combustion_chamberhttp://en.wikipedia.org/wiki/Truckhttp://en.wikipedia.org/wiki/Automobilehttp://en.wikipedia.org/wiki/Automobilehttp://en.wikipedia.org/wiki/Truckhttp://en.wikipedia.org/wiki/Combustion_chamberhttp://en.wikipedia.org/wiki/Fuel_injectionhttp://en.wikipedia.org/wiki/Diesel_enginehttp://www.wisegeek.com/what-is-a-rotor.htmhttp://www.wisegeek.com/what-are-brake-pads.htmhttp://www.wisegeek.com/what-are-disc-brakes.htmhttp://www.wisegeek.com/what-are-brake-shoes.htmhttp://www.wisegeek.com/what-are-drum-brakes.htm


12/17

12

car is headed; the car's computer then makes the necessary corrections to bring the

vehicle's direction of travel in line with what the driver wanted.

- ESC, in particular, takes advantage of two other systems, ABS and traction control, plus

a few special sensors, to do its job.

- ESC also uses traction control for driving safety. If ESC is in charge of monitoring side-

to-side motion around a vertical axis, traction control is in charge of front-to-back

motion. If the traction control system is detecting wheel slippage, the electronic stabilitycontrol sensor will pick up on the direction of the slide. If there's a difference between the

angle of the steering wheel and the direction the car is sliding, the ESC will work with the

traction control system to engage the ABS at the proper wheel (or wheels) and control thethrottle to reduce the speed of the vehicle, too.

10. Engine coolant temperature

- The Engine Coolant Temperature Sensor ("ECT" for short) is an analog sensor which,

as it's name says, measures the temperature of the coolant and feeds this data to the on-

board computer. The computer then uses this data to maintain optimum driveabilityespecially while the engine is warming up and until it reaches operating temperature. Inthe days before electronic engine control modules, the choke on the carburetor served this

purpose, ie. to cause a rich fuel mixture at least until the engine was warmed up.

Frequently the engine had to idle at high rpm to keep it running when cold. Often it

would stall before it got warm.

- While water may be the best cooling liquid, it's not suitable for this use in engines

because it evaporates far too fast, enhances corrosion of metal parts and freezes veryquickly during cold weather. Thus, engine coolant has been developed chemically to

perform its functions at much higher and lower temperatures than water.

11. Engine Pre-Heating

- An engine preheating system preheats an engine such as a diesel engine efficiently and

quickly with heating members such as self-temperature-controlling glow plugs. When theengine is to be preheated quickly, a voltage to be applied to the heating members is

increased by electric energy stored in capacitor capacitors, and a large current is supplied

to the heating members to preheat the engine in a short period of time.


13/17

13

12. Engine retarder

Torque converter, opened, interior similar to a retarder

- A retarder is a device used to augment or replace some of the functions of primary

friction-based braking systems, usually on heavy vehicles.

- Friction-based braking systems are susceptible to 'brake fade' when used extensively forcontinuous periods, which can be dangerous if braking performance drops below what isrequired to stop the vehicle for instance if a truckorbus is descending a long decline.

For this reason, such heavy vehicles are frequently fitted with a supplementary system

that is not friction-based.

- Retarders serve to slow vehicles, or maintain a steady speed on declines, and help

prevent the vehicle 'running away' by accelerating down the decline. They are not usuallycapable of bringing vehicles to a standstill, as their effectiveness diminishes as vehicle

speed lowers. They are usually used as an additional 'assistance' to slow vehicles, with

the final braking done by a conventional friction braking system. As the friction brake

will be used less, particularly at higher speeds, their service life is increased.

13. Immobilizer

- An immobilizer or immobilizer is an electronic device fitted to an automobile whichprevents the engine from running unless the correct key (or other token) is present. This

prevents the car from being "hot wired" after entry has been achieved.

Immobilizers have a radio frequency transmitter that goes on your keychain. The sensor

that is in the dashboard or somewhere near the ignition detects the unique frequency of

the transmitter in order to allow the car to run.

- Aftermarket immobilizers come in all different styles. Generally speaking, it dependsentirely on the specific cars specifications in terms of fuel delivery system and ignition

system to determine how to immobilize the car.

- A car with an electronically powered fuel pump (which is likely fuel injected) can beeasily immobilized if the power relay to the fuel pumps operation is intervened from the
http://en.wikipedia.org/wiki/Frictionhttp://en.wikipedia.org/wiki/Brakehttp://en.wikipedia.org/wiki/Vehiclehttp://en.wikipedia.org/wiki/Brake_fadehttp://en.wikipedia.org/wiki/Truckhttp://en.wikipedia.org/wiki/Bushttp://en.wikipedia.org/wiki/Declinehttp://en.wikipedia.org/wiki/Electronicshttp://en.wikipedia.org/wiki/Automobilehttp://en.wikipedia.org/wiki/Hotwiringhttp://en.wikipedia.org/wiki/Hotwiringhttp://en.wikipedia.org/wiki/Automobilehttp://en.wikipedia.org/wiki/Electronicshttp://en.wikipedia.org/wiki/Declinehttp://en.wikipedia.org/wiki/Bushttp://en.wikipedia.org/wiki/Truckhttp://en.wikipedia.org/wiki/Brake_fadehttp://en.wikipedia.org/wiki/Vehiclehttp://en.wikipedia.org/wiki/Brakehttp://en.wikipedia.org/wiki/Friction


14/17

14

immobilizer system. A fuel injected car with an immobilizer circuit would typically

disable the fuel pump, fuel injection control, as well as the ignition circuit. A car that is

carbureted on the other hand, likely uses a mechanical fuel pump from stock, andtherefore you cannot prevent fuel flow directly without the use of solenoids in between

fuel lines to stop flow physically. A carbureted car with a mechanical fuel pump would

likely only have the ignition circuit disabled in the event of immobilization.

- A very simple immobilizer simply cuts power to the starter by replacing the starter relay

with one that is controlled by the immobilizer control circuit if the key transmitter is not

present. These systems are good, but nowhere near the theft prevention that a factoryimmobilizer provides. With enough time and thought, one could easily shop ahead of

time for the specific relays a car they are looking to steal has, and replace the

immobilizers aftermarket relays with the stock ones and cut the immobilizer circuit out of

the equation.

14. Lane departure warning

- A lane departure warning system is a mechanism designed to warn a driver when the

vehicle begins to move out of its lane (unless a turn signal is on in that direction) onfreeways and arterial roads.

- These systems are designed to minimize accidents by addressing the main causes of

collisions: driving error, distraction and drowsiness.

15. OBD II Malfunction

- A malfunction indicator lamp (MIL), commonly referred to as the "Check EngineLight" is an indicator of malfunction of the computerized engine management system. It

is found on the instrument console of most automobiles.
http://en.wikipedia.org/wiki/Lanehttp://en.wikipedia.org/wiki/Turn_signalhttp://en.wikipedia.org/wiki/Freewayhttp://en.wikipedia.org/wiki/Arterial_roadhttp://en.wikipedia.org/wiki/Arterial_roadhttp://en.wikipedia.org/wiki/Freewayhttp://en.wikipedia.org/wiki/Turn_signalhttp://en.wikipedia.org/wiki/Lane


15/17

15

- When illuminated, it is typically either an amber or red color.

- On vehicles equipped with OBD-II, the light has two stages: steady (indicating a minor

fault such as a loose gas cap or failing oxygen sensor) and flashing (indicating a severe

fault, that will eventually destroy the catalytic converter, such as a misfire).

- When the MIL is lit, the engine control unit stores a fault code related to the

malfunction, which can be retrieved with a scan tool and used for further diagnosis.

The malfunction indicator lamp is usually labeled with the text check engine, serviceengine soon, check engine soon, or a picture of an engine.

16. Power take OFF

- A power take-off or power takeoff (PTO) is a splined driveshaft, usually on a tractorortruck, that can be used to provide power to an attachment or separate machine.

- It is designed to be easily connected and disconnected.

- Allows implements to draw energy from the tractor's engine.

17. Urea Level

- Urea binds with the nitrogen oxide emitted by diesel engines, thus reducing diesel

emissions responsible for smog and respiratory illnesses such as asthma.

- According to a spokesperson from the Selective Catalytic Reduction Stakeholders

Group, urea tanks reduce the nitrogen oxide produced by diesel engines by as much as 90

percent.

- Use of a diesel particulate filter can further reduce emissions to almost 100 percent.

- Urea tanks must be filled every 10,000 to 15,000 miles, depending on the maker.

- When the tank is empty a safety mechanism prevents the vehicle from starting, andsome makers have not included a urea gauge to indicate urea level.
http://en.wikipedia.org/wiki/On-Board_Diagnosticshttp://en.wikipedia.org/wiki/Oxygen_sensorhttp://en.wikipedia.org/wiki/Engine_control_unithttp://en.wikipedia.org/wiki/On-board_diagnostics#Scan_toolshttp://en.wikipedia.org/wiki/Rotating_splinehttp://en.wikipedia.org/wiki/Driveshafthttp://en.wikipedia.org/wiki/Tractorhttp://en.wikipedia.org/wiki/Truckhttp://www.ehow.com/cars/http://www.ehow.com/cars/http://en.wikipedia.org/wiki/Truckhttp://en.wikipedia.org/wiki/Tractorhttp://en.wikipedia.org/wiki/Driveshafthttp://en.wikipedia.org/wiki/Rotating_splinehttp://en.wikipedia.org/wiki/On-board_diagnostics#Scan_toolshttp://en.wikipedia.org/wiki/Engine_control_unithttp://en.wikipedia.org/wiki/Oxygen_sensorhttp://en.wikipedia.org/wiki/On-Board_Diagnostics


16/17

16

- Most automobiles with urea tanks do have a warning system in place, but the system

doesn't allow the level of awareness that a gauge would provide.

- Urea can be manufactured industrially by using ammonia/carbon dioxide technology.

Under pressure and under high temperatures, ammonia and carbon dioxide react creating

ammonia, ammonium carbamate and urea. The urea is crystallized and removed, and theammonia and carbamate are recycled into the reactor.

- Urea is a toxic chemical. Exposure to urea crystals can cause burning in the throat andlungs. Furthermore, urea is combustible. (Gasoline is both toxic and combustible as well

when mishandled.)
http://www.ehow.com/cars/http://www.ehow.com/cars/


17/17

17

Bibliography:

http://en.wikipedia.org/wiki/Malfunction_indicator_lamp, 2011-03-20

http://en.wikipedia.org/wiki/Lane_departure_warning_system, 2011-03-20

http://en.wikipedia.org/wiki/Immobiliser, 2011-03-20

http://en.wikipedia.org/wiki/Retarder_%28mechanical_engineering%29\, 2011-03-29

http://www.ehow.com/about_5770638_engine-coolant-temperature-characteristics.html,

2011-03-29

http://auto.howstuffworks.com/car-driving-safety/safety-regulatory-devices/electronic-stability-control1.htm, 2011-04-03

http://en.wikipedia.org/wiki/Electronic_Diesel_Control, 2011-04-03

http://wiki.answers.com/Q/What_does_the_edc_light_on_an_iveco_mean, 2011-04-03

http://en.wikipedia.org/wiki/Power_take-off, 2011-04-03

http://auto.howstuffworks.com/differential2.htm, 2011-04-03

http://wiki.answers.com/Q/How_do_differential_locks_work, 2011-04-03

http://www.ehow.com/facts_5643207_urea-tank_.html, 2011-04-03
http://en.wikipedia.org/wiki/Malfunction_indicator_lamphttp://en.wikipedia.org/wiki/Malfunction_indicator_lamphttp://en.wikipedia.org/wiki/Lane_departure_warning_systemhttp://en.wikipedia.org/wiki/Lane_departure_warning_systemhttp://en.wikipedia.org/wiki/Immobiliserhttp://en.wikipedia.org/wiki/Immobiliserhttp://en.wikipedia.org/wiki/Retarder_%28mechanical_engineering%29/http://en.wikipedia.org/wiki/Retarder_%28mechanical_engineering%29/http://www.ehow.com/about_5770638_engine-coolant-temperature-characteristics.htmlhttp://www.ehow.com/about_5770638_engine-coolant-temperature-characteristics.htmlhttp://auto.howstuffworks.com/car-driving-safety/safety-regulatory-devices/electronic-stability-control1.htmhttp://auto.howstuffworks.com/car-driving-safety/safety-regulatory-devices/electronic-stability-control1.htmhttp://auto.howstuffworks.com/car-driving-safety/safety-regulatory-devices/electronic-stability-control1.htmhttp://en.wikipedia.org/wiki/Electronic_Diesel_Controlhttp://en.wikipedia.org/wiki/Electronic_Diesel_Controlhttp://wiki.answers.com/Q/What_does_the_edc_light_on_an_iveco_meanhttp://wiki.answers.com/Q/What_does_the_edc_light_on_an_iveco_meanhttp://en.wikipedia.org/wiki/Power_take-offhttp://en.wikipedia.org/wiki/Power_take-offhttp://auto.howstuffworks.com/differential2.htmhttp://auto.howstuffworks.com/differential2.htmhttp://wiki.answers.com/Q/How_do_differential_locks_workhttp://wiki.answers.com/Q/How_do_differential_locks_workhttp://www.ehow.com/facts_5643207_urea-tank_.htmlhttp://www.ehow.com/facts_5643207_urea-tank_.htmlhttp://www.ehow.com/facts_5643207_urea-tank_.htmlhttp://wiki.answers.com/Q/How_do_differential_locks_workhttp://auto.howstuffworks.com/differential2.htmhttp://en.wikipedia.org/wiki/Power_take-offhttp://wiki.answers.com/Q/What_does_the_edc_light_on_an_iveco_meanhttp://en.wikipedia.org/wiki/Electronic_Diesel_Controlhttp://auto.howstuffworks.com/car-driving-safety/safety-regulatory-devices/electronic-stability-control1.htmhttp://auto.howstuffworks.com/car-driving-safety/safety-regulatory-devices/electronic-stability-control1.htmhttp://www.ehow.com/about_5770638_engine-coolant-temperature-characteristics.htmlhttp://en.wikipedia.org/wiki/Retarder_%28mechanical_engineering%29/http://en.wikipedia.org/wiki/Immobiliserhttp://en.wikipedia.org/wiki/Lane_departure_warning_systemhttp://en.wikipedia.org/wiki/Malfunction_indicator_lamp

Telltales - How it works.docx

Documents

Transcript of Telltales - How it works.docx